How to separate a fistful of seeds from a container of them

[Ezhe]

Just as the subject, you can put fistful of seeds into a bag, a box or a basket, but how can you separate any fistful of them from the container? So you can use them as bird bait

[JP_Finn]

Once an item is placed in a container it can’t be individually removed. (The game treats container contents as liquid)
You can use the seeds in container to plant—sow, and also as seasoning in cooking recipes.

[Bakkat]

wouldn't be a nice add-up in the future to be able to "detach" the content from the container?
As in a realistic approach, it is normal to, for example, take all the berries from a wooden bowl. Getting an empty bowl and the berries
separately. 
Right now to get the empty container you should
A- Pass all the content to a new container
B- Use the content till there's nothing left
C- Discard it

Am I missing something?